CVE-2018-16098 in ThinkPad
Summary
by MITRE
In some Lenovo ThinkPads, an unquoted search path vulnerability was found in various versions of the Synaptics Pointing Device driver which could allow unauthorized code execution as a low privilege user.
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Analysis
by VulDB Data Team • 05/06/2020
The vulnerability CVE-2018-16098 represents a critical unquoted search path weakness discovered in Synaptics Pointing Device drivers distributed with certain Lenovo ThinkPad models. This flaw stems from improper handling of directory paths during driver installation processes where the system fails to properly quote or validate the search paths used to locate executable components. The vulnerability specifically affects systems running Windows operating systems and manifests when the driver installation process searches for required libraries or executables in directories that are not properly quoted, creating opportunities for path traversal attacks.
The technical implementation of this vulnerability involves the Windows installer mechanism and driver loading processes where the system searches for dependent modules in a specific order. When the Synaptics driver is installed, it creates registry entries that define the search paths for various components. However, if these paths contain spaces and are not properly quoted, an attacker can place malicious executables in directories that are searched before the legitimate system directories. This creates a privilege escalation scenario where a low-privileged user can execute arbitrary code with the privileges of the system account, effectively bypassing standard user access controls.
From an operational perspective, this vulnerability poses significant risks to enterprise environments where Lenovo ThinkPad devices are deployed. The attack vector requires minimal user interaction as it typically exploits the default installation behavior of the driver software. Security researchers have identified that the vulnerability exists across multiple versions of the Synaptics Pointing Device driver, making it widespread and difficult to remediate without comprehensive patch management. The impact extends beyond simple code execution as it can potentially lead to complete system compromise, data exfiltration, and persistent backdoor establishment.
The vulnerability aligns with CWE-428, which specifically addresses unquoted search paths in Windows systems, and represents a common attack pattern categorized under the MITRE ATT&CK framework as privilege escalation through service misconfiguration. Organizations deploying affected ThinkPad models should implement immediate mitigations including applying vendor patches, disabling unnecessary driver components, and implementing strict access controls for system directories. Network segmentation and monitoring for suspicious file creation in system directories can help detect exploitation attempts. Additionally, regular security audits should verify proper driver installation practices and ensure that all system components are updated to their latest secure versions.
The broader implications of CVE-2018-16098 highlight the importance of proper software installation practices and the need for robust supply chain security measures. This vulnerability demonstrates how seemingly minor installation configuration issues can create significant security risks, particularly in enterprise environments where multiple devices are managed centrally. Organizations should establish comprehensive patch management policies and conduct regular vulnerability assessments to identify similar unquoted search path issues in other third-party software installations. The incident underscores the necessity of implementing security controls that prevent unauthorized code execution and maintain system integrity through proper privilege management and access controls.